Ask the seller for proof the repair was completed, or run the free VIN check. Recall repairs are done at no cost by a dealer.
Recalls
Safety issues the manufacturer must repair for free. A recall means confirm the fix was done, not walk away.
Structure recall
A detached roof panel can become a road hazard, increasing the risk of a crash.
- Remedy
- Dealers will replace the front panel, free of charge. Owner notification letters were mailed on August 2, 2024. Owner notification letters will be mailed in phases, on, March 22,2024, and August 2, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. This recall is an expansion of NHTSA recall number 21V-197.
- Status
- Remedy available. Confirm by VIN that this repair was completed.
- What to do
- Enter the VIN on NHTSA's recall lookup to confirm this car was repaired.
Safety recall
An inoperable rearview camera display reduces the driver's rear view, increasing the risk of a crash.
- Remedy
- Dealers will update the rearview camera software, free of charge. Owner notification letters were mailed July 15, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022060007.
- Status
- Remedy available. Confirm by VIN that this repair was completed.
- What to do
- Enter the VIN on NHTSA's recall lookup to confirm this car was repaired.
Exterior lighting recall
Incorrectly adjusted headlights may reduce visibility, increasing the risk of a crash.
- Remedy
- Dealers will replace the LED headlights, free of charge. Interim letters notifying owners of the safety risk were mailed August 13, 2021. A second notice will be sent once the remedy is available. Owner notification letters were mailed January 2022. Owners may contact MBUSA customer service at 1-800-367-6372.
- Status
- Remedy available. Confirm by VIN that this repair was completed.
- What to do
- Enter the VIN on NHTSA's recall lookup to confirm this car was repaired.
Structure recall
The adhesive bonding of the front panel might deteriorate, possibly causing the front panel to detach from the vehicle and become a road hazard, increasing the risk of a crash.
- Remedy
- Mercedes-Benz dealer will remove the bonded panel and will install a new front panel by following the detailed repair instructions and using the approved primer, cleaner and adhesive, free of charge. Owner notification letters were mailed on September 3, 2021 and October 26, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.
- Status
- Remedy available. Confirm by VIN that this repair was completed.
- What to do
- Enter the VIN on NHTSA's recall lookup to confirm this car was repaired.
Seat belts recall
If the seat belt does not fully retract, the occupant may find the operation of the seat belt inconvenient and not wear it, increasing the risk of injury in the event of a crash.
- Remedy
- MBUSA will notify owners, and dealers will check the retraction function of the front seat belts and adjust the damping foam within the B-pillars, as necessary, free of charge. The recall began February 26, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021020010.
- Status
- Remedy available. Confirm by VIN that this repair was completed.
- What to do
- Enter the VIN on NHTSA's recall lookup to confirm this car was repaired.
Engine recall
An oil leak in the presence of an ignition source such as hot engine or exhaust components can increase the risk of a fire.
- Remedy
- MBUSA will notify owners, and dealers will inspect the turbocharger oil lines and tighten them as necessary, free of charge. The recall began August 17, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2020070017.
- Status
- Remedy available. Confirm by VIN that this repair was completed.
- What to do
- Enter the VIN on NHTSA's recall lookup to confirm this car was repaired.
Safety recall
An inaccurate vehicle location may delay emergency responders, increasing the risk of injury.
- Remedy
- MBUSA will notify owners, and dealers will replace the communication module, free of charge. The recall began April 14, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2020030016.
- Status
- Remedy available. Confirm by VIN that this repair was completed.
- What to do
- Enter the VIN on NHTSA's recall lookup to confirm this car was repaired.
Electrical system recall
A disabled eCall system would prevent a vehicle occupant from contacting the emergency services call center in an emergency, potentially delaying emergency responders and increasing the risk of injury.
- Remedy
- The communication module software will be updated through an Over-the-Air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed July 8, 2022. Owner notification letters will be mailed in phases, on July 8, 2022, May 17, 2024, July 29, 2024, and September 27, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers are for this recall is 2022060005 and 2023110006.
- Status
- Corrected automatically through an over-the-air software update.
- What to do
- Enter the VIN on NHTSA's recall lookup to confirm this car was repaired.
Electrical system recall
Failure of the eCall system may result in emergency responders being dispatched to the wrong location, increasing the risk of injury following a crash.
- Remedy
- MBUSA will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. The recall began March 12, 2021. Owners may contact MBUSA customer service at 1-877-762-8267. MBUSA's number for this recall is 2021020025.
- Status
- Corrected automatically through an over-the-air software update.
- What to do
- Enter the VIN on NHTSA's recall lookup to confirm this car was repaired.
Owner complaints by system
Unverified reports owners filed with NHTSA, grouped by the part of the car. Useful for spotting patterns. Open a group to read recent examples.
Engine & powertrain
5
Most reports here involve sudden stalling.
Read full complaint
Vehicle has ongoing and recurring electrical and engine-related defects that affect safe operation. The primary systems involved are the electrical system, engine ignition system, and powertrain. The vehicle is available for inspection upon request. Prior service records show issues beginning in 2020 involving repeated electronic system failures requiring multiple repairs and component replacements. Since purchasing the vehicle in April 2023, the vehicle has developed more serious failures, including: – September 2024: Check engine light with loss of power and inability to exceed safe driving speeds – October 2024: Engine misfiring due to ignition coil failure requiring replacement of ignition components – September 2025: Additional ignition coil electrical fault (code P0353) The problem has been reproduced and confirmed through dealership service inspections and diagnostic reports. Warning indicators, including the check engine light, appeared prior to failure events. These defects create a safety risk due to potential loss of power, engine failure, and unreliable vehicle operation while driving, which could increase the risk of an accident. The issues have required multiple repairs without permanent resolution and appear to be ongoing and worsening over time.
Source: NHTSA complaint ODI #11733212 · view all complaints for this vehicle at nhtsa.gov
Brakes
1
Most reports here involve software faults.
Read full complaint
points: ⸻ While driving, the vehicle displays the warning “Active Brake Assist Functions Limited – See Operator’s Manual.” The message appears during normal driving and does not go away. This warning indicates that the automatic emergency braking / Active Brake Assist system is limited or disabled, reducing a critical safety feature designed to help prevent or mitigate collisions. This creates a safety risk because the vehicle may not automatically brake in an emergency situation. The warning appeared suddenly while driving, with no visible obstructions, weather conditions, or damage to sensors. Restarting the vehicle does not consistently clear the message. The issue has not yet been inspected by a dealer or repair facility. The cause of the malfunction is UNKNOWN, and the vehicle is available for inspection.
Source: NHTSA complaint ODI #11710171 · view all complaints for this vehicle at nhtsa.gov
Steering, suspension & tires
2
Most reports here involve loss of steering.
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BOTH the front tires in my 2020 Mercedes C300 developed sudden belt separation while driving at highway speed this past weekend. These tires were installed by Mercedes of Delray Beach Florida as part of my CPO vehicle purchase in September of 2022 and have less-than 20K miles on them. Tires are Continental ProContact size 225/45 R18 and marked M+S as well as MOE. The vehicle received a routine four-wheel alignment as part of my annual servicing in July 2025 by Mercedes of Fort Pierce, and no indication of any tire issue was mentioned. Tire pressures have been consistently checked monthly and always set cold to 37-PSI specifications. The first indication of a tire issue was a sudden vibration in the steering wheel and I thought I may have lost a wheel weight after driving thru our local car wash the day prior.
Source: NHTSA complaint ODI #11689319 · view all complaints for this vehicle at nhtsa.gov
Airbags & seat belts
1
Most reports here involve airbags not deploying.
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I purchased this vehicle on December 26, 2025 from an authorized Mercedes-Benz dealership. Shortly after the purchase, I discovered an issue related to the airbag system, which indicates a potential safety defect. At the time of purchase and during the test drive, the vehicle was already turned on, and no warning or disclosure was provided regarding any airbag malfunction or warning message. The issue became apparent only after the purchase. I later brought the vehicle in for repairs. While some repairs were performed, the airbag issue was not fixed and remains in the same condition as before. The dealership is now refusing to repair the airbag system at no cost and is insisting that I pay for the repair, despite the fact that this defect appeared immediately after purchase and was never disclosed to me. I believe this represents a serious safety concern, as a malfunctioning airbag system may fail to protect occupants in the event of an accident. I also believe the vehicle was sold to me with an undisclosed safety defect. I am requesting that this issue be formally reviewed and investigated.
Source: NHTSA complaint ODI #11712823 · view all complaints for this vehicle at nhtsa.gov
Structure & body
5
Most reports here involve software faults. Of these, 1 mention an injury.
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I own a 2020 Mercedes-Benz C300 equipped with a power trunk. On July 22, 2026, I took my vehicle to Annapolis Mercedes-Benz because the power trunk was repeatedly closing on its own while people were standing in the trunk opening. I specifically reported that the trunk was unexpectedly closing while I, my child, or another individual was loading or unloading the vehicle and expressed concern that someone could be injured. The dealership kept the vehicle for several hours but advised me that no malfunction could be found. I was told the trunk had been reset and that there were no problems with the vehicle. I also provided video evidence of the trunk malfunction by text message to my service advisor. On August 2, 2026, the exact same problem occurred. While I was loading groceries into the trunk, the power trunk unexpectedly closed without warning and struck my son in the head, causing injury. This incident occurred after I had already reported the same safety concern to the dealership. I believe the power trunk is malfunctioning intermittently and presents a significant safety hazard because it can unexpectedly close on a person while the trunk is being used. I am requesting that NHTSA investigate this potential safety defect, as it may pose a risk of injury to other vehicle owners and passengers.
Source: NHTSA complaint ODI #11754327 · view all complaints for this vehicle at nhtsa.gov
Other systems
1
Most reports here involve premature wear.
Read full complaint
THE COMPONENT THAT IS MALFUCTIONING IS THE COVERTABLE TOP OF MY 2020 C300 CABRIOLET MERCESDES BENZ. THE STRINGS/CORDS THAT HOLD THE LINER OF THE COVERTABLE TOP TO THE ROOF ARE BREAKING AND IT MAKES THE COVERTIBLE TOP INOPERABLE. THERE WAS NO WARNING LAMP OR NOTICE OF THIS DEFECT. THERE IS ONLY 11595 MILES ON MY 4 YEAR OLD CAR THAT IS GARAGED. THIS OCCURRED 1 YEAR AFTER MY WARRANTY EXPIRED. THIS WOULD CAUSE THE TOP TO BE STUCK IN THE MIDDLING OF OPENING AND IT COULD NOT BE MOVED MECHANICALLY TO GET IT FULLY OPENED OR CLOSED TO THE WEATHER AND IS UNDRIVABLE.THE COST TO REPAIR IT IS ESTIMATED BY THE DEALER AT $4,000.00. tHE DEALER IS WELL AWARE OF TGIS LATENT DEFECT.
Source: NHTSA complaint ODI #11635599 · view all complaints for this vehicle at nhtsa.gov
How does it compare with other years? The 2020 has 15 complaints on file, fewer than the 2019 (32) and more than the 2021 (10). Of the 6 model years of the Mercedes-Benz C 300 we cover, the 2018 has the most (99). Older model years have had longer to collect complaints.